Wire or cable bundle tie



April 18, 1961 F. DE BARTOLO 2,979,794

WIRE OR CABLE BUNDLE TIE Filed Sept. 24, 1956 AMI/Wm! flame/r I!51170.40, 55

United States Patent WIRE'OR CABLE BUNDLE TIE Francis De Bartolo, 11043Braddock Drive, Culver City, Calif.

Filed Sept. 24, 1956, Ser. N0. 611,676

2 Claims. 01. 24-17 This invention relates to wire or cable bundle tiesand more particularly to a novel clamping type of tie loop that holdsautomatically when pulled up and may be readily released when the tieloop clamp is pressed.

Tying bundles of wires or cables together with cord or laces or similarbinding means requires the tying of knots which takes time to do. Inhigh speed production operations where such bundles must be tied to bepermanently held together, considerable time is lost in tying thebundles, and if the tie must be taken apart a knot must be removed orcut.

I have devised a wire or cable bundle tie which incorporates a straploop fabricated from comparatively flexible material such as polyamideresin. Along one face of the strap loop is a series of serrations. Theseserrations may run the entire length of the loop strap. At the other endof the strap loop a guiding clamp is formed through which the serratedend may be inserted. The clamp is in the form of an oval with guidesections on one inner wall of the oval and a sawtoothed tongue on theopposite wall which may engage the serrations to prevent the end beingpulled back out, once inserted. If the loop must be opened this can beaccomplished simply by pressing the flexible shorter sides of the ovaltogether thus raising the tongue and permitting the withdrawal of theserrated end of the strap from the clamp.

Accordingly it is an object of this invention to provide a wire or cablebundle tie which has a ready clamping means and will hold a strap loopclosed against great pressure but which permits the strap loop to bereleased by pressing upon the clamping means.

It is a further object of this invention to provide a wire or cablebundle tie-in the form of a loop having a serratile strap with a toothedclamping guide at one end through which the serratile strap may beinserted in one direction and clamped against removal in the oppositedirection until the clamping guide is pressed upon its sides.

These and other objects of this invention will be more fully understoodfrom the specification which follows when taken together with thedrawings in which:

Fig. 1 is a view of the serrated cable or wire bundle tie of thisinvention with a portion of the clamping guide in cross section to showthe clamping action thereof;

Fig. 2 is a view looking into the clamping guide with a portion of theserrated strap in cross section; and

Fig. 3 is a view of a portion of the serratile end of the strap of a tieaccording to this invention and the clamping guide in their relationjust prior to the insertion of the serrated strap into the loop.

Referring now to Fig. 1 a cable tie according to this invention is shownas it may be used to tie a bundle of wires or cables. A flexible strap'10 is formed with a clamping guide 13 at one end 14 and serrations suchas 11, 12, 16, 17, 18 and 19, along the length of one face of the otherend 15, thereof. The clamping guide 13 is shown in cross section toillustrate the position of the rice serrations such as 16 and 17 of theserrated end of the strap when inserted in clamping guide 13 in thedirection of arrow 20 so that the sawtoothed tongue 25 of clamping guide13 holds its flat surface 26 against the flat surface of the tooth shownat 17 to prevent motion of the serrated strap 15 in the direction ofarrow 27.

The serrations such as 11 and 12 of end 15 of strap 10' neednot'necessarily have the sawtoothed configuration shown but may have anyother notched shape which will function to prevent motion in onedirection while not impeding motion in the other direction.

In Figs. 2 and 3 details of the clamping guide 13 are shown. The ovaloidside. walls 23 and 24 of clamping guide 13 are more flexible than baseportion 14 of the clamping guide 13 or the opposite wall 28 of whichsawtoothed tongue 25 is a contiguous part. Base portion 14 is contiguousand continuous with strap 10 and may be molded as a part thereof. Whereovaloid side walls 23 and 24 join base 14 extruded guides 22 and 21respectively are formed projecting inwardly to receive and center withinthe clamping guide 13 the serratile cord end 15 and to guide theserrations such as 17, 18 and 19 under sawtooth tongue 25. Side walls 23and 24 extend into the strap 14 to strengthen the walls with respect tostrap 14 and further guide the other end 15 of the strap 10 wheninserted in clamping guide 13.

The side walls 23 and 24 have a normal position as shown in Figs. 2 and3 but when these walls 23 and 24 are pressed inwardly the clamp assumesthe shape shown in the dashed outline 30 so that the cord end 15 canthen be readily removed in the direction of arrow 27 shown in Fig. 1.

There has been described above a wire or cable bundle tie in the form ofa serratile strap (10 and 15) with a clamping guide (13) for the strapat one end (14). The clamping guide (13) receives the serrated end (15)of the strap (10) to hold it firmly with an interlocking sawtoothedtongue 25 in the ceiling (28) of the clamping guide 13) by virtue of thenormal shape of the guide (13). The shape of the guide may be' distorted(as at 30) to permit release of the serrated end (15) of strap 10) fromthe sawtooth tongue (25).

The embodiment illustrated in the figures and described above may bemodified to other shapes in performance of the functions of thisinvention within the scope of the appended claims.

What is claimed as new is:

1. A wire or cable bundle tie in the form of a noose slidable one wayand selectively clampable against movement the opposite way comprising:a flexible strap having transverse serrations on one face and at one endthereof; and a. clamping guide loop with outwardly bowed flexible sidewalls on the other end thereof, said clamping guide loop being on thesame face as said transverse serrations and having a transverse sawtoothtongue depending from the upper inside surface thereof, the verticalportion of said saw-tooth tongue facing the vertical portions of saidtransverse serrations so that when said one end of said strap isinserted through said guide loop, said vertical portion of said tongueengages the vertical portion of one of said transverse serrations, saidflexible side walls of said toothed notches, and being normally widerthan the height thereof; said flexible sided loop having a truncatedinternal tooth transversely and dependently positioned in the inner topsurface of said flexible sided loop, said internal tooth beingdimensioned for interfitting engagement with one of said transversesaw-toothed notches of said strap when the opposite end of said strapwith respect to said loop is inserted through said flexible sided 100p,said flexible sided loop being deformable by pressure against theflexible sides thereof to lift said internal tooth, thereby disengagingsaid internal tooth from said one of said notches of said strap torelease said strap.

. References Cited in the file of this patent UNITED STATES PATENTSWightman Aug. 24, Schacht Ian. 14, Hoffman Sept. 19, Bowman Mar. 27,Heugas Sept. 15, Smith Oct. 31, Edwards Aug. 21,

FOREIGN PATENTS 7 Great Britain J an. 20,

